Senior AI Engineer for MCP & RAG (LLM Systems)

Mastercard Inc.; Celbridge; On-site; EUR 90,000 - 130,000; Full time

Job summary

Mastercard Inc. is seeking a Senior Software Engineer to design and deliver AI-powered solutions leveraging LLMs, RAG, and knowledge bases.

You will build scalable backend and frontend components, collaborate with product and data teams, and drive secure, production-ready AI capabilities across cloud platforms. The role emphasizes architectural leadership, hands-on development with LangChain, vector databases, and model context protocols, while mentoring junior engineers and promoting

Qualifications

• 5–10 years of software engineering experience with AI/ML focus.
• Bachelor’s or Master’s degree in CS, AI, or Data Science.

Responsibilities

• Design and deliver AI-powered solutions using LLMs and RAG.
• Build knowledge bases with vector search for semantic retrieval.
• Develop LLM-driven apps with LangChain and orchestration patterns.
• Implement Model Context Protocols (MCP) or similar frameworks.
• Architect scalable, secure solutions across AWS, Cloudera, and Databricks.
• Collaborate with product, engineering, and data teams to translate business needs into AI-enabled solutions.
• Develop and maintain robust APIs and microservices for AI applications.
• Mentor junior engineers and promote engineering best practices.

Skills

Python backend

Angular frontend

LLM frameworks

RAG concepts

Distributed systems

Education

Bachelor’s or Master’s in CS/AI/Data Science

Tools

LangChain

AWS

Cloudera

Databricks

Docker

Kubernetes

Job description

Mastercard Inc. is seeking a Senior Software Engineer to design and deliver AI-powered solutions leveraging LLMs, RAG, and knowledge bases.

You will build scalable backend and frontend components, collaborate with product and data teams, and drive secure, production-ready AI capabilities across cloud platforms. The role emphasizes architectural leadership, hands-on development with LangChain, vector databases, and model context protocols, while mentoring junior engineers and promoting